Tagged Questions

In computer networking, network address translation (NAT) is the process of modifying network address information in datagram (IP) packet headers while in transit across a traffic routing device for the purpose of remapping one IP address space into another.

Our ISP has given us a /25 range of IP addresses on our lease line.
We want to be able to create several VLAN's and direcly assign each VLAN with any number of these WAN IP addresses.
For example -
...

I have Zyxell ZyWall USG-50 router firewall and I want to configure dual WAN navigation.
On WAN1 I've 10Mbits connection and on WAN2 I've 100Mbits connection.
I want my LAN to navigate with WAN2 and ...

I have a custom-built Wifi "Hotspot" setup which is built like this:
Draytek Vigor 2860 router connects to the Internet (via ADSL), no
custom setup other than settings for connecting to our ISP via ...

I have two OpenVPN servers at different location.
Each machine in one location can ping and connect to every machine in the other location.
My problem is when I use SSH to connect from machine A in ...

I have 2 public addresses on mikrotik. Both using nat, but first is for normal users and second is for servers that I use on public network.
I need to connect to second ip and services behind second ...

For some reasons I need to switch a server ip to another ip, in order to be seen by another computer elsewhere through vpn.
So I'm using iptables (didn't know any of that until yesterday) and testing ...

I have 2 IPs public (but one physical network port) and i want redirect IP public 1 on my VM 1 and, IP public 2 on my VM 2
But when i check my NAT configuration i can just redirect port on my interne ...

So I've got 2 instances on AWS set up so I can SSH into them directly (A, B) from my home machine C.
But I want to set up box A so that I can forward certain UDP and TCP connections from it to box B.
...

I have an active internet connection from provider on festethernret0 and also have vlan1. I need to have an internet connection from festethernret0 to my vlan1. I am doing it this way:
access-list 2 ...

Basically, I am trying to rate-limit requests to a mailserver at the firewall level, but whitelist several company-owned IP ranges. I can whitelist one IP addresses range, but not several, because of ...

I have a cisco asa 5505. The outside and inside IPs are private IPs so I do not want to NAT the inside IPs as they go out the Outside interface (there is a router upstream of the ASA 5505. Would I do ...

I have an active directory local domain set up with 2 DC's running DHCP and DNS. Because my ISP uses NAT there is no way to host services externally. How can I link an Azure VM into my local active ...

I have implemented a softether vpn server on one aws server connected to other instances in a LAN. I can ssh into the server with ssh myname@10.0.1.10 without problem. I followed this guide
My goal ...

I'm trying to enable https management of our Sonicwall NSA 220 wireless-N from the LAN interface, but browsing to the WAN IP. This is because:
we also need WAN side management
we don't have VPN set ...

I am running Sipwitch on ec2 and I am able to connect two clients (1 microsip and 1 Phonerlite), but when I dial 201 from 202 extension, the call gets disconnected after 15-16 seconds.
I learnt this ...

Since my hoster doesn't allow briged setups I had to go for a NAT solution to run my CentOS VM on an additional IP and my host machine on the primary IP.
Now, I've got a problem since for ports 22, ...

I started to explore the option of connecting with other using a p2p connection, so I coded a simple socket program in JAVA for android devices in which the user in which the users can share simple ...

First of all I have already taken a look at similar questions such as :
http://serverfault.com/questions/392979/asterisk-sip-2-0-401-unauthorized
or
Asterisk 401 Unauthorized when trying to register ...